diff --git a/qiskit_addon_obp/utils/visualization.py b/qiskit_addon_obp/utils/visualization.py
index 06c9a9e..5d698c0 100644
--- a/qiskit_addon_obp/utils/visualization.py
+++ b/qiskit_addon_obp/utils/visualization.py
@@ -29,6 +29,7 @@ def plot_accumulated_error(metadata: OBPMetadata, axes: Axes, *, show_legend: bo
     which exists within our context.
 
     .. plot::
+       :alt: Output from the previous code.
        :context:
        :nofigs:
 
@@ -36,6 +37,7 @@ def plot_accumulated_error(metadata: OBPMetadata, axes: Axes, *, show_legend: bo
        >>> metadata = OBPMetadata.from_json("docs/_static/dummy_visualization_metadata.json")
 
     .. plot::
+       :alt: Output from the previous code.
        :context: close-figs
        :include-source:
 
@@ -99,6 +101,7 @@ def plot_left_over_error_budget(
        >>> metadata = OBPMetadata.from_json("docs/_static/dummy_visualization_metadata.json")
 
     .. plot::
+       :alt: Output from the previous code.
        :context: close-figs
        :include-source:
 
@@ -146,6 +149,7 @@ def plot_slice_errors(metadata: OBPMetadata, axes: Axes, *, show_legend: bool =
        >>> metadata = OBPMetadata.from_json("docs/_static/dummy_visualization_metadata.json")
 
     .. plot::
+       :alt: Output from the previous code.
        :context: close-figs
        :include-source:
 
@@ -201,6 +205,7 @@ def plot_num_paulis(metadata: OBPMetadata, axes: Axes, *, show_legend: bool = Tr
        >>> metadata = OBPMetadata.from_json("docs/_static/dummy_visualization_metadata.json")
 
     .. plot::
+       :alt: Output from the previous code.
        :context: close-figs
        :include-source:
 
@@ -250,6 +255,7 @@ def plot_num_truncated_paulis(
        >>> metadata = OBPMetadata.from_json("docs/_static/dummy_visualization_metadata.json")
 
     .. plot::
+       :alt: Output from the previous code.
        :context: close-figs
        :include-source:
 
@@ -304,6 +310,7 @@ def plot_sum_paulis(metadata: OBPMetadata, axes: Axes, *, show_legend: bool = Tr
        >>> metadata = OBPMetadata.from_json("docs/_static/dummy_visualization_metadata.json")
 
     .. plot::
+       :alt: Output from the previous code.
        :context: close-figs
        :include-source:
 
@@ -360,6 +367,7 @@ def plot_num_qwc_groups(metadata: OBPMetadata, axes: Axes, *, show_legend: bool
        >>> metadata = OBPMetadata.from_json("docs/_static/dummy_visualization_metadata.json")
 
     .. plot::
+       :alt: Output from the previous code.
        :context: close-figs
        :include-source:
 
diff --git a/tox.ini b/tox.ini
index f4dcff8..8fb92c2 100644
--- a/tox.ini
+++ b/tox.ini
@@ -22,7 +22,7 @@ commands =
 
 [testenv:lint]
 image-tester-commit = 7ae965ccf21c39e5170334ec7f4882756883860a
-deps = 
+deps =
   git+https://github.com/Qiskit/documentation.git@{[testenv:lint]image-tester-commit}\#egg=sphinx-alt-text-validator&subdirectory=scripts/image-tester
 basepython = python3.10
 extras =
@@ -34,7 +34,7 @@ commands =
   nbqa ruff docs/
   mypy qiskit_addon_obp/
   pylint -rn qiskit_addon_obp/ test/
-  sphinx-alt-text-validator -f qiskit_addon_obp -s qiskit_addon_obp/utils/visualization.py
+  sphinx-alt-text-validator -f qiskit_addon_obp
   nbqa pylint -rn docs/
   typos
   reno lint